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NVD / CVE Program· CNA redhat

CVE-2024-3657: 389-ds-base: potential denial of service via specially crafted kerberos as-req request

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 70% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: 389-ds-base (AlmaLinux:8) 1.4.3.39-7.module_el8.10.0+3864+d8eec553; 389-ds-base-devel (AlmaLinux:8) 1.4.3.39-7.module_el8.10.0+3864+d8eec553; 389-ds-base-legacy-tools (AlmaLinux:8) 1.4.3.39-7.module_el8.10.0+3864+d8eec553.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to 389-ds-base (AlmaLinux:8) 1.4.3.39-7.module_el8.10.0+3864+d8eec553; 389-ds-base-devel (AlmaLinux:8) 1.4.3.39-7.module_el8.10.0+3864+d8eec553; 389-ds-base-legacy-tools (AlmaLinux:8) 1.4.3.39-7.module_el8.10.0+3864+d8eec553 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in 389-ds-base. A specially-crafted LDAP query can potentially cause a failure on the directory server, leading to a denial of service

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
May 28, 2024
Updated
Jun 17, 2026
EPSS
1.2% · 70th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8

    • 8060020250210084424.0ca98e7e and laternot affected · rpm

  • Red Hat Red Hat Directory Server 11.7 for RHEL 8

    • 8080020240909040333.f969626e and laternot affected · rpm

  • Red Hat Red Hat Directory Server 11.8 for RHEL 8

    • 8090020240606122459.91529cd0 and laternot affected · rpm

  • Red Hat Red Hat Directory Server 11.9 for RHEL 8

    • 8100020240604161237.37ed7c03 and laternot affected · rpm

  • Red Hat Red Hat Directory Server 12.2 EUS for RHEL 9

    • 9020020240916150035.1674d574 and laternot affected · rpm

  • Red Hat Red Hat Directory Server 12.4 for RHEL 9

    • 9040020240604143706.1674d574 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • 0:1.3.11.1-5.el7_9 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • 8100020240613122040.25e700aa and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support

    • 8080020240807050952.6dbb3803 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 9

    • 0:2.4.5-8.el9_4 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8389-ds-basebefore 1.4.3.39-7.module_el8.10.0+3864+d8eec5531.4.3.39-7.module_el8.10.0+3864+d8eec553
AlmaLinux:8389-ds-base-develbefore 1.4.3.39-7.module_el8.10.0+3864+d8eec5531.4.3.39-7.module_el8.10.0+3864+d8eec553
AlmaLinux:8389-ds-base-legacy-toolsbefore 1.4.3.39-7.module_el8.10.0+3864+d8eec5531.4.3.39-7.module_el8.10.0+3864+d8eec553
AlmaLinux:8389-ds-base-libsbefore 1.4.3.39-7.module_el8.10.0+3864+d8eec5531.4.3.39-7.module_el8.10.0+3864+d8eec553
AlmaLinux:8389-ds-base-snmpbefore 1.4.3.39-7.module_el8.10.0+3864+d8eec5531.4.3.39-7.module_el8.10.0+3864+d8eec553
AlmaLinux:8python3-lib389before 1.4.3.39-7.module_el8.10.0+3864+d8eec5531.4.3.39-7.module_el8.10.0+3864+d8eec553
AlmaLinux:9389-ds-basebefore 2.4.5-8.el9_42.4.5-8.el9_4
AlmaLinux:9389-ds-base-develbefore 2.4.5-8.el9_42.4.5-8.el9_4
AlmaLinux:9389-ds-base-libsbefore 2.4.5-8.el9_42.4.5-8.el9_4
AlmaLinux:9python3-lib389before 2.4.5-8.el9_42.4.5-8.el9_4
Debian:11389-ds-basebefore 1.4.4.11-2+deb11u11.4.4.11-2+deb11u1
Debian:12389-ds-basebefore 2.3.1+dfsg1-1+deb12u12.3.1+dfsg1-1+deb12u1
Debian:13389-ds-basebefore 3.1.1+dfsg1-13.1.1+dfsg1-1
openSUSE:Leap 15.5389-dsbefore 2.2.10~git2.345056d3-150500.3.21.12.2.10~git2.345056d3-150500.3.21.1
openSUSE:Leap 15.5389-dsbefore 2.2.10~git18.20ce9289-150500.3.24.12.2.10~git18.20ce9289-150500.3.24.1
openSUSE:Leap 15.6389-dsbefore 2.2.10~git2.345056d3-150600.8.7.22.2.10~git2.345056d3-150600.8.7.2
openSUSE:Leap 15.6389-dsbefore 2.2.10~git18.20ce9289-150600.8.10.12.2.10~git18.20ce9289-150600.8.10.1
openSUSE:Tumbleweed389-dsbefore 3.1.1~git0.aef1668-1.13.1.1~git0.aef1668-1.1
Red Hat:directory_server_e4s:11.5::el8389-ds-basebefore 0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde
Red Hat:directory_server_e4s:11.5::el8389-ds-base-debuginfobefore 0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde
Red Hat:directory_server_e4s:11.5::el8389-ds-base-debugsourcebefore 0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde
Red Hat:directory_server_e4s:11.5::el8389-ds-base-develbefore 0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde
Red Hat:directory_server_e4s:11.5::el8389-ds-base-legacy-toolsbefore 0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde
Red Hat:directory_server_e4s:11.5::el8389-ds-base-legacy-tools-debuginfobefore 0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde0:1.4.3.34-4.module+el8dsrv+22781+5fe99dde

+96

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-11774389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leading to heap buffer overflow
    30Monitor
  • CVE-2025-14905389-ds-base: 389-ds-base: remote code execution and denial of service via heap buffer overflow
    28Monitor
  • CVE-2024-5953389-ds-base: malformed userpassword hash may cause denial of service
    22Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-2199May 28, 2024 · 389-ds-base: malformed userpassword may cause crash at do_modify in slapd/modify.c
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:389-ds-base2.4.5-8.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:389-ds-base-devel2.4.5-8.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:389-ds-base-legacy-tools1.4.3.39-7.module_el8.10.0+3864+d8eec553 · AlmaLinux:8Package registry (OSV)
almalinux:389-ds-base-libs2.4.5-8.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:389-ds-base-snmp1.4.3.39-7.module_el8.10.0+3864+d8eec553 · AlmaLinux:8Package registry (OSV)
almalinux:python3-lib3892.4.5-8.el9_4 · AlmaLinux:9Package registry (OSV)
debian:389-ds-base2.3.1+dfsg1-1+deb12u1 · Debian:12Package registry (OSV)
opensuse:389-ds2.2.10~git2.345056d3-150600.8.7.2 · openSUSE:Leap 15.6Package registry (OSV)
red hat:389-ds-base0:1.3.11.1-5.el7_9 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:389-ds-base-debuginfo0:1.3.11.1-5.el7_9 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:389-ds-base-debugsource0:2.4.5-8.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:389-ds-base-devel0:1.3.11.1-5.el7_9 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:389-ds-base-legacy-tools0:1.4.3.37-10.module+el8dsrv+21971+f7435891 · Red Hat:directory_server:11.8::el8Package registry (OSV)
red hat:389-ds-base-legacy-tools-debuginfo0:1.4.3.37-10.module+el8dsrv+21971+f7435891 · Red Hat:directory_server:11.8::el8Package registry (OSV)
red hat:389-ds-base-libs0:1.3.11.1-5.el7_9 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:389-ds-base-libs-debuginfo0:2.4.5-8.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:389-ds-base-snmp0:1.3.11.1-5.el7_9 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:389-ds-base-snmp-debuginfo0:2.4.5-8.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:cockpit-389-ds0:2.4.5-4.module+el9dsrv+21964+c7e95493 · Red Hat:directory_server:12.4::el9Package registry (OSV)
red hat:python3-lib3890:2.4.5-8.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:389-ds-base0:2.4.5-8.el9_4 · Rocky Linux:9Package registry (OSV)
suse:389-ds2.2.10~git2.345056d3-150600.8.7.2 · SUSE:Linux Enterprise Module for Server Applications 15 SP6Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-21990 days apart389-ds-base: malformed userpassword may cause crash at do_modify in slapd/modify.c
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (13 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records